intimate vs touch on

intimate

verb
  • To suggest or disclose (something) discreetly. 

  • To notify. 

adj
  • Pertaining to details that require great familiarity to know. 

  • Closely acquainted; familiar. 

  • Very finely mixed. 

  • Of or involved in a sexual relationship. 

  • Personal; private. 

noun
  • A very close friend. 

  • Women's underwear, sleepwear, or lingerie, especially offered for sale in a store. 

touch on

verb
  • To mention briefly; to cursorily discuss. 

  • To come or go to for a short time. 

How often have the words intimate and touch on occurred in a corpus of books? (source: Google Ngram Viewer )